All three players were left out of the squad for Friday’s pre-season tie against Crystal Palace in Singapore, with the manager reporting issues for both Alisson and Jota.Gomez’s absence was more precautionary, however, said Klopp.“Diogo is a concern. With Diogo it’s a muscle again,” he told Liverpoolfc.com ahead of kick-off versus the Eagles at Singapore National Stadium.“Joe, no. Joe is just a precaution and not any kind of risk-taking is worth it. He is really good in the pre-season so far; he felt a little bit here and there so we said, ‘OK, then he is out.’“Ali is not cool as well; it will not be too long but each day Ali is not involved is already too long, to be honest.”